What is the minimum required throw for a 2000 LPM monitor specified in this standard?

A minimum horizontal throw of 60 metres in jet stream mode is required as per Table 1.

What materials are acceptable for the monitor body?

The body can be made of cast stainless steel (Grade CF8M of IS 6913), gunmetal (LTB 2 of IS 318), or other corrosion-resistant alloys as specified in Clause 5.

What pressure test is required for the monitor body?

The monitor body must withstand a hydrostatic pressure of 2.3 MPa for 2 minutes without any leakage, as per Clause 9.2.

What are the standard foam induction rates for these monitors?

The monitors are designed for either 3% or 6% foam concentrate induction, as specified in Clause 8.1.

IS 15811

: 2008

Long-range water-cum-foam monitor with self-inducting, aspirating and non-aspirating jet and spray/fog nozzle forfire fighting -Specification

CurrentSpecializedSpecificationBIMFire Safety · Fire Fighting

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This standard specifies the requirements for materials, construction, performance, and testing of long-range water-cum-foam monitors. It covers monitors with self-inducting capabilities and various nozzle types (aspirating, non-aspirating, spray/fog) designed for large-scale industrial firefighting applications.

Long-range water-cum-foam monitor with self-inducting, aspirating and non-aspirating jet and spray/fog nozzle forfire fighting -Specification

Quick Reference Values

Minimum flow rate2000, 3000, or 4000 LPM

Minimum horizontal throw (jet) for 2000 LPM monitor60 m

Minimum horizontal throw (jet) for 4000 LPM monitor70 m

Hydrostatic test pressure2.3 MPa for 2 minutes

Foam induction rate3% or 6%

Monitor vertical travel range-45° to +90°

Monitor horizontal travel range360° continuous

Practical Notes

Ensure the monitor material (e.g., SS 316L, Gunmetal) is selected based on the corrosivity of the installation environment (e.g., marine, chemical).

Verify the foam induction percentage during commissioning tests using a refractometer to ensure effective foam generation as per design.

The specified 'long-range' performance is highly dependent on achieving the required inlet pressure at the monitor base; hydraulic calculations for the supply piping are critical.